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Java Developer

Job

ConnectedX, Inc.

Phoenix, AZ (In Person)

Full-Time

Posted 3 days ago (Updated 19 hours ago) • Actively hiring

Expires 7/26/2026

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Job Description

Job Title:

Java Backend Developer Location:

Phoenix (Onsite - In-Person)

Interview Process:

One-Shot In-Person Interview Only Experience Required:

5-7

Years Employment Type:

Full-Time /

Contract Work Authorization:

Open to all work-authorized candidates (No visa restrictions) Job Description We are seeking an experienced Java Backend Developer to join our team supporting a strategic initiative for our Client in Phoenix, AZ. The ideal candidate will have strong expertise in backend development, API architecture, and payment gateway integrations. Candidates with experience in Kotlin and/or Go (Golang) are highly preferred. This role requires a hands-on engineer who can design, build, and support scalable, secure, and high-performance backend services in a modern microservices environment. Key Responsibilities Design, develop, and maintain scalable backend applications using Java. Build and enhance RESTful APIs and microservices for enterprise-grade applications. Develop and support integrations with payment processing and payment gateway platforms. Work extensively with API Gateway technologies to manage, secure, and monitor APIs. Collaborate with architects, product owners, and cross-functional teams to deliver high-quality solutions. Implement secure coding practices and ensure compliance with enterprise security standards. Troubleshoot production issues and optimize application performance. Participate in code reviews, technical design discussions, and architecture decisions. Contribute to CI/CD pipelines and DevOps best practices. Required Qualifications 5-7 years of hands-on experience in Java backend development. Strong experience with Java, Spring Boot, and Microservices architecture. Solid experience designing and developing REST APIs. Hands-on experience with API Gateway platforms (Apigee, Kong, AWS API Gateway, MuleSoft, or similar). Proven experience working with Payment Gateway integrations and payment processing systems. Strong understanding of distributed systems, event-driven architecture, and backend design patterns. Experience with relational and NoSQL databases. Familiarity with cloud environments and containerization technologies. Strong problem-solving and communication skills. Preferred Qualifications Experience with Kotlin development. Experience with Go (Golang) development. Prior experience in financial services, fintech, payment processing, or banking domains. Experience with messaging technologies such as Kafka or RabbitMQ. Knowledge of OAuth2, JWT, API security, and authentication frameworks.

Technical Skills Must Have:

Java Spring Boot Microservices REST APIs API Gateway Payment Gateway Integration SQL/NoSQL Databases Git Nice to

Have:

Kotlin Go (Golang) Kafka Docker Kubernetes Cloud Platforms (AWS/Azure/Google Cloud Platform)

Additional Information Location:

Phoenix, AZ (100% Onsite)

Interview:

One-shot In-Person Interview (No virtual option)

Experience:

5-7

Years Priority Skills:

API Gateway, Payment Gateway Experience, Kotlin, Go (Golang), Java Backend Development.